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Harman Kardon AVR 430 Help

 
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dcalz



Joined: 09 May 2005
Posts: 1

PostPosted: Mon May 09, 2005 1:10 am    Post subject: Harman Kardon AVR 430 Help Reply with quote

I just hooked up my Harman Kardon AVR 430 at my new home and it turns on for about 3 seconds and then shuts off. Has anyone experienced this problem or can you point me in the right direction? The things I have plugged into it are as follows: DVD player using component video cable and regular audio cables; Comcast Digital Cable Box using component video cables and regular audio cables. The monitor goes to my large HDTV with component video cables. I have surround sound speakers and a sub woofer connected as well.
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Cloudmine
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PostPosted: Sat Mar 18, 2006 10:53 am    Post subject: Same problem with HK AVR430 Reply with quote

I too have an H/K AVR430 for about 1 year now. All of a sudden it simply turns off after about 3 to 5 seconds. There has not been any change in setup. Any ideas?

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phungerf
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PostPosted: Wed Sep 09, 2009 12:29 am    Post subject: AVR 430 shutting off Reply with quote

I have had an AVR 430 for several years and it has always worked perfectly. The other day it just started shutting off after 2-3 seconds. No matter what source I turn on and even with no external hookups. I assume that some internal component has gone bad. Any idea of what it is or how to fix it?? Any help would be great.
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Leonard_Washington
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PostPosted: Sun Jun 05, 2011 2:14 pm    Post subject: AVR430 Reply with quote

Mine has been doing the same. Need help
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Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Sun Jun 05, 2011 8:03 pm    Post subject: Reply with quote

This Parts & Service manual can be purchased for $11.77 and downloaded immediately after payment from http://www.justmanuals.com

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jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Sun Jun 05, 2011 8:54 pm    Post subject: Reply with quote

Just download. No payments involved (aka FREE):
http://elektrotanya.com/?q=showresult&megnev=harman%20kardon&megnev2=AVR430&kategoria=&kat2=all
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bob91343
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PostPosted: Wed Jun 11, 2014 11:47 pm    Post subject: AVR-430 Reply with quote

I am also trying to repair the unit, with the same symptom. I have the manual, which is pretty much useless in this case.

Adjusting the bias, well the first reading I got was very low and the receiver won't stay on long enough to allow the reading to stabilize.

I had a Yamaha with a similar problem. No info in any manual as to how to track down this issue. Any ideas?
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srb151



Joined: 28 Jun 2014
Posts: 11

PostPosted: Mon Jun 30, 2014 2:19 pm    Post subject: Amp problem... Reply with quote

Not sure, but it sounds like the protection circuit might be kicking in,
or one of the supply voltages is missing. First thing to check is to see
if you have all voltages out of the power supply system. Haven't had
the time to look at the manual much, but usually you have some low
voltage sources (+15,-15,+5, etc) and a high voltage source (+65,-65)
or so to drive the amp. (These are not actual voltages, just examples).
Need to check all of these during the brief time it runs.
Two thing about reading voltages. Turn of autoranging and set to the
voltage range you're looking for to improve response time of the meter.
Second, you said the bias voltage was low? Specs call for 23mv bias.
How much lower is it? If you're much over a volt or so, you probably have
a problem with that channel.
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